EP2708815A2

EP2708815A2 - A gas tap for touch-sensitive gas control systems

Info

Publication number: EP2708815A2
Application number: EP13164656.4A
Authority: EP
Inventors: Gokhan Turhan; Mehmet Demirezen; Isa Gun; Murat Avci
Original assignee: Turas Gaz Armatuerleri Sanayi ve Ticaret AS
Current assignee: Turas Gaz Armatuerleri Sanayi ve Ticaret AS
Priority date: 2012-09-17
Filing date: 2013-04-22
Publication date: 2014-03-19
Also published as: EP2708815A3

Abstract

A gas tap (2) used in domestic cooking appliances, which can be used in touch-sensitive gas control systems allowing touch control of the gas flow passing through gas taps, said gas tap comprising a body (2.1), a gas inlet 2.2), a gas outlet (2.3), a male (2.4), a pin (2.5), a gasket (2.11), a gearbox (2.12), a servomotor (2.14), a gear (2.15), a pinion (2.16) and a gear system cover (2.13) as well as an electromagnet (2.6) directly connected to a control panel (1) by means of a connecting cable (2.7), said electromagnet permiting gas passage or stopping gas flow in accordance with the information coming from control panel.

Description

TECHNICAL FIELD

The invention relates to a gas tap with electromagnet that can be used in gas control systems enabling gas taps used in domestic cooking appliances to be touch controlled by the user.
As known, general operating principle of gas taps is that the gas at a certain flow rate is directed to outlets in accordance with the rotation angle of the shaft. The gas directed to outlets is transferred to the burners where burning occurs via interconnecting pipes and burning takes place with a spark from the igniter. In current situation, this process is started by the user when s/he pushes the tap shaft forward manually and rotates it counter clockwise. Thus, the holes or channels on the male which are to be positioned inside tap body are located in accordance with gas inlet, and the gas passing therefrom at a certain flow rate is directed to tap outlet. Again, when the user wants to turn the tap off, it is required that s/he has to rotate the shaft clockwise until "0" reference point. The invention relates to controlling gas flow rate with a single touch instead of pushing the shaft forward and rotating it, without any need for the shaft, in the gas tap with electromagnet operating synchronically with touch-sensitive gas control system, and thus achieving a burning in desired power (kW) level in burners. Within the touch-sensitive gas control system, it will be enough for the user to select the desired burning state by only touching the button. For the former purpose, the newly developed gas tap with electromagnet will be able to be used.

STATE OF THE ART

Within the state of the art, there are many applications regarding either touch button and touch control systems, or electromagnet. Now, reference will be made to several existing applications in literature with regard to subject matter.
The application made by the firm Electrolux Professional and numbered EP 2 273 678 A2 discloses a touch button for cooking appliances. As seen in Fig. 1, the user can adjust any burning state desired by a single touch with his/her finger (F). However, this application covers only touch button, yet it discloses no gas control system or gas tap.
Again, the application made by the firm Electrolux Home Product Corporation and numbered WO 2006/128831 discloses a touch-sensitive control panel. This panel comprises an outer plate (1) (i.e. upper part) with external contact areas (100) and a command assembly (2) (i.e. lower part) with an electronic circuit and components (3) thereof. This application only discloses a touch-sensitive control panel. Therefore, said application differs from the subject matter of the present invention and discloses no gas control system, gas tap or burner connected to said panel. The control panel developed within the scope of our invention is completely different from the one disclosed therein.
The application numbered US 2002/0045142 discloses a touch-controlled gas control system. In this application, as seen in Fig. 1, the invention comprises a burner (114) where burning occurs and which is composed of a microcontroller (101), two valves (112, 113), a gas line conduit (123), an igniter (117), a flame holder, as well as comprising various modules (igniter module, sensor module, etc.). However, as seen in the figure, this system is quite complex and two valves (112, 113) within the system are only schematically displayed. In other words, no novelty or improvement on the valves has been made. Within our invention, on the other hand, a simple gas control system and a new gas tap with electromagnet operating in coordination with this system are disclosed.
The application owned by the firm Orkli S. Coop. and numbered EP 1 909 029 discloses a safety electromagnetic gas tap. As seen in Fig. 1, an electromagnet (2) is provided in safety gas tap and the operation of said electromagnet within the system is explained. In this application, an electromagnet is used in gas tap, just as in our invention. However, the electromagnet comprised by our invention operates completely as a part of touch-sensitive control system and permits gas passage or stops gas flow, via the current coming from control panel. Therefore, our invention is quite a different application from the former application.
The application owned by the firm Mondragon Componentes S. Coop. and numbered EP 2 203 044 discloses a gas tap (3) comprising an electromagnet therein, as in the application numbered EP 1 909 029 . The magnet used therein also functions as a part of the touch-sensitive control system, just as in the former application.
There are many applications regarding present subject matter in literature. Only some of these applications have been referred above shortly. As seen, there exist applications regarding the entire touch-sensitive control system, in addition to applications only focusing on the component called electromagnet. Completely different from these applications, our invention discloses a gas control system for domestic cooking appliances and a gas tap with electromagnet operating in coordination with said system. Said gas tap comprises gearbox, big size gear (hereinafter will be referred to as gear), pinion and gear system cover.

OBJECT OF THE INVENTION

The object of the invention is to introduce a gas tap operating in coordination with touch-sensitive gas control systems allowing touch control of the gas flow rate directed to outlet in gas taps used in domestic cooking appliances.
In another preferred embodiment of the invention, safety gas tap which is used in domestic cooking appliances and which directs gas flow to the burners by synchronically operating with touch-sensitive gas control system (A) comprises a body, a gas inlet, a gas outlet, a male, a pin, a gasket, a gearbox, a servomotor, a gear, a pinion and a gear system cover; as well as an electromagnet directly connected to control panel by means of an electromagnet connecting cable.
In another preferred embodiment of the invention, two screw holes are provided on the gearbox in order for it to reach to connecting screws easily.
In another preferred embodiment of the invention, two C-shaped cavities are provided in circular gear housing (2.12.8), which is positioned symmetric to Y-axis.
In another preferred embodiment of the invention, the distance between the centers of these two C-shaped cavities is equal to or greater than the ridge diameter in the lower surface of the gear.
In another preferred embodiment of the invention, one adjustment screw hole is provided on the gearbox in order for the user to reach to the adjustment screw easily.
In another preferred embodiment of the invention, at least one thread having a thread length different from thread length of the threads that are radially scattered around gear center along the spring (w), which a certain angle α faces, is provided.
In another preferred embodiment of the invention, at least one closed position thread cavity is provided in the pinion such that at least one thread on the gear will be placed therein in order to define the closed position.
In another preferred embodiment of the invention, the length b1 on the pinion is the same size as the depth b2 on the gearbox.
In another preferred embodiment of the invention, one adjustment screw hole is provided on gear system cover in order to reach to the adjustment screw easily.
In another preferred embodiment of the invention, the inner diameter of the circular vertical extension is equal to or greater than pin diameter, in order for the circular vertical extension provided on gear system cover to center the pin.
The structural and characteristic features and all advantages of the invention will be understood more clearly with the detailed description written by referring to the following figures; therefore, the evaluation needs to be done by taking these figures and the detailed description into consideration.

DESCRIPTION OF THE FIGURES

Fig. 1 is the overall perspective view of a cooker provided with touch-sensitive gas control system and with gas tap with electromagnet according to the invention,
Fig. 2 is the perspective view showing the inner part of the cooker provided with touch-sensitive gas control system and with gas tap according to the invention,
Fig. 3 is the cross-sectional view of a cooker provided with touch-sensitive gas control system and with gas tap according to the invention,
Fig. 4 is the schematic view of touch-sensitive gas control system,
Fig. 5 is the overall perspective view of the gas tap according to the invention,
Fig. 6 is the exploded view of the gas tap according to the invention,
Fig. 7 is the overall perspective view of the gas tap according to the invention, in which electromagnet part is omitted,
Fig. 8 is the overall perspective view of the pin of the gas tap according to the invention,
Fig. 9 is the overall perspective view of the male of the gas tap according to the invention,
Fig. 10 is another perspective view of the gas tap according to the invention,
Fig. 11 is the overall perspective view showing the inner part of the gearbox in the gas tap according to the invention,
Fig. 12 is the perspective view showing the gearbox of the gas tap according to the invention,
Fig. 13 is another perspective view showing the gearbox of the gas tap according to the invention,
Fig. 14 is another perspective view showing the gearbox of the gas tap according to the invention,
Fig. 15 is the top view of the gearbox of the gas tap according to the invention,
Fig. 16 is the cross-sectional view showing the gearbox of the gas tap according to the invention,
Fig. 17 is the top perspective view showing gear system cover of the gas tap according to the invention,
Fig. 18 is the bottom perspective view showing gear system cover of the gas tap according to the invention,
Fig. 19 is the top view of the gear system cover of the gas tap according to the invention,
Fig. 20 is the overall perspective view showing the servomotor of the gas tap according to the invention,
Fig. 21 is another perspective view showing the servomotor of the gas tap according to the invention,
Fig. 22 is the top perspective view of the gear of the gas tap according to the invention,
Fig. 23 is the bottom perspective view of the gear of the gas tap according to the invention,
Fig. 24 is the top view of the gear of the gas tap according to the invention,
Fig. 25 is the top view of the other side of the gear of the gas tap according to the invention,
Fig. 26 is the bottom perspective view of the pinion of the gas tap according to the invention,
Fig. 27 is the top perspective view of the pinion of the gas tap according to the invention,
Fig. 28 is the top view of the pinion of the gas tap according to the invention,
Fig. 29 is the top view of the other side of the pinion of the gas tap according to the invention,
Fig. 30 is the overall perspective view of the gear pair consisting of a pinion and a gear within the gas tap according to the invention,
Fig. 31 is the top view showing the gear pair consisting of a pinion and a gear within the gas tap according to the invention.

REFERENCE NUMERALS

A. Touch-sensitive gas control system
B. Cooker
1. 1. Control panel
  - 1.1. Microprocessor
  - 1.2. Signal amplifier
  - 1.3. Digital indicator
  - 1.4. Touch button
  - 1.5. Touch button connecting cable
  - 1.6. Power cable
  - 1.7. Gas flow
  - Q. Flow rate of the gas delivered to the burner (3) from the tap (2) by means of interconnecting pipes
2. 2. Gas tap
  - 2.1. Body
  - 2.2. Gas inlet
  - 2.3. Gas outlet
  - 2.4. Male
    - 2.4.1. Male (2.4) crack
    - 2.4.2. Gas passage holes and channels of the male (2.4)
    - 2.4.3. Outer diameter of the upper part of the male (2.4)
  - 2.5. Pin
    - 2.5.1. Pin (2.5) diameter
  - 2.6. Electromagnet
  - 2.7. Electromagnet connecting cable
  - 2.8. Spring
    - 2.8.1. The segment preventing the spring (2.8) from being displaced
  - 2.9. Union
  - 2.10. Adjustment screw
  - 2.11. Gasket
  - 2.12. Gearbox
    - 2.12.1. Screw holes
    - 2.12.2. Adjustment screw (2.10) hole
    - 2.12.3. Mounting holes onto the body
    - 2.12.4. Fixing screw hole of servomotor (2.14)
    - 2.12.5. Connecting cable duct of servomotor (2.14)
    - 2.12.6. Male (2.4) passage hole
      - 2.12.6.1. Inner level of male passage hole (2.12.6)
        
        2.12.6.1.1. Diameter of the inner level (2.12.6.1) of male passage hole
      - 2.12.6.2. Diameter of male passage hole (2.12.6)
    - 2.12.7. Servomotor (2.14) housing
      - 2.12.7.1. Width of servomotor housing (2.12.7)
    - 2.12.8. Circular gear (2.15) housing
      - 2.12.8.1. Diameter of circular gear housing (2.12.8)
    - 2.12.9. Two C-shaped cavities
      - 2.12.9.1. The distance between the two C-shaped cavities (2.12.9)
    - 2.12.10. Circular pinion (2.16) housing
      - 2.12.10.1. Circular pinion housing (2.12.10) diameter
    - 2.12.11. Screw hole cavities
    - 2.12.12. Mounting holes of gear system cover (2.13)
    - 2.12.13. Fixing ridges of servomotor (2.14)
      - 2.12.13.1. Length of fixing ridges (2.12.13)
      - 2.12.13.2. L-shaped ridges
    - 2.12.14. Connecting screws
    - b2. Depth of the inner level of male passage hole (2.12.6)
  - 2.13. Gear system cover
    - 2.13.1. Screw holes
      - 2.13.1.1. Inner level of screw holes (2.13.1)
    - 2.13.2. Adjustment screw hole
    - 2.13.3. Lower surface
      - 2.13.3.1. Circular gear housing
        
        2.13.3.1.1. Circular gear housing (2.13.3.1) diameter
      - 2.13.3.2. Peripheral gear beveling
      - 2.13.3.3. Circular pinion housing
        
        2.13.3.3.1. Circular pinion housing (2.13.3.3) diameter
      - 2.13.3.4. Peripheral pinion beveling
      - 2.13.3.5. Circular vertical extension
        
        2.13.3.5.1. Inner diameter of circular vertical extension (2.13.3.5)
        
        2.13.3.5.2. Outer diameter of circular vertical extension (2.13.3.5)
      - 2.13.3.6. U-shaped vertical extension
        
        2.13.3.6.1. Depth of U-shaped vertical extension (2.13.3.6)
      - 2.13.3.7. At least two vertical extensions provided between screw holes
    - 2.13.4. Upper surface
    - 2.13.5. Connecting screws
  - 2.14. Servomotor
    - 2.14.1. Servomotor (2.14) outlet gear
    - 2.14.2. Connecting cable of servomotor (2.14)
    - 2.14.3. Fixing screw of servomotor (2.14)
    - 2.14.4. Connecting projection of servomotor (2.14)
      - 2.14.4.1. Lower surface of servomotor connecting projection (2.14.4)
    - 2.14.5. Lower surface of servomotor (2.14)
    - 2.14.6. Distance between lower surface (2.14.4.1) of servomotor connecting projection and lower surface (2.14.5) of servomotor
  - 2.15. Gear
    - 2.15.1. Gear upper surface
      - 2.15.1.1. The ridge on gear upper surface (2.15.1)
        
        2.15.1.1.1. Ridge (2.15.1.1) diameter
      - 2.15.1.2. Stepped center screw hole on gear upper surface (2.15.1)
    - 2.15.2. Gear lower surface
      - 2.15.2.1. The ridge on gear lower surface (2.15.2)
        
        2.15.2.1.1. Ridge (2.15.2.1) diameter
        
        2.15.2.2. Stepped and internal threaded center hole in gear lower surface (2.15.2)
      - 2.15.3. Threads that are radially scattered around gear center on the spring section (w), which angle α faces.
        
        2.15.3.1. At least one thread having a different thread length
        
        2.15.3.1.1. Thread length of at least one thread (2.15.3.1) having a different thread length
      - 2.15.4. Connecting screw of gear (2.15)
      - 2.15.5. Outer diameter of gear (2.15)
      - α. center angle
      - w. the spring which center angle (α) faces
    - 2.16. Pinion
      - 2.16.1. Pinion (2.16) hole
        
        2.16.1.1. Inner level of pinion hole (2.16.1)
        
        2.16.1.1.1. Diameter of the inner level (2.16.1.1) of the pinion hole
        
        2.16.1.2. Diameter of pinion hole (2.16.1)
      - 2.16.2. Pinion (2.16) nail
        
        2.16.2.1. Width of pinion nail (2.16.2)
      - 2.16.3. Radially scattered threads around pinion (2.16) center
      - 2.16.4. Closed position thread cavity of the pinion (2.16)
      - 2.16.5. Upper surface of pinion (2.16)
      - 2.16.6. Upper surface of thread section in pinion (2.16)
      - 2.16.7. Pinion (2.16) inner diameter
      - 2.16.8. Pinion (2.16) outer diameter
      - b1. Distance between upper surface (2.16.5) of pinion and upper surface (2.16.6) of thread section
3. 3. Burner
  - 3.1. Igniter
  - 3.2. Igniter connecting cable
  - 3.3. Flame holder
  - 3.4. Flame holder connecting cable
  - 3.5. Flame holder grounding cable
4. 4. Cooker (B) grill
5. 5. Transformer
6. 6. Cooker (B) lower plate
7. 7. Cooker (B) upper glass
8. 8. Cooker (B) interconnecting pipes
9. 9. Cooker (B) fan
10. 10. Cooker (B) indicator

DETAILED DESCRIPTION OF THE INVENTION

In Fig. 1, the overall perspective view of a cooker (B) which is provided with gas control system (A) according to the invention, and to which gas tap (2) according to the invention operating in coordination with said gas control system (A) is mounted, is given. As seen in figure, four burners (3) and individual grills (4) for each burner (3) are provided on the cooker (B). Moreover, there exist touch button (1.4), digital indicator (1.3) and an indicator (10) to facilitate burner selection for the user, in order to touch control each burner (3) on the lower glass (7) of the cooker (B). In Fig. 2, another perspective view showing the inner part of the same cooker (B) is given. As seen in figure, four individual taps (2) for directing the gas to each burner (3) are provided, said taps being located on the lower plate (6) of the cooker. The gas exiting gas taps (2) is transferred to burners (3) by means of interconnecting pipes (8). Again, electrical energy to individual igniters (3.1) provided for each burner (3) is provided by the transformer (5) so as to ignite the burners (3). Moreover, since electronic components are present in the system, a fan (9) is provided in said cooker (B) in order to prevent these components from being damaged by heat. In Fig. 3, cross-sectional view of the same cooker (B) is given. In this figure, cross-sectional views of safety gas taps (2) according to the invention mounted on the cooker (B), which will be described in detail later, are given.
In Fig. 4, schematic view of touch-sensitive gas control system (A) developed for domestic cookers or ovens, is given. The system is composed of a control panel (1), at least one gas tap (2) directing the gas, and at least one burner (3) where the gas at a certain flow rate (Q) passing through this gas tap (2) is directed and where burning takes place. Provided within said control panel (1) are; a microprocessor (1.1) controlling the system and enabling all the information coming from software to be processed, a digital indicator (1.3) indicating the flow rate passage position of the tap (2), and a signal amplifier (1.2) amplifying the signal coming from flame holder (3.3) to such a level that can be detected by software. In addition, a touch button (1.4) connected to said control panel (1) by means of a connecting cable (1.5) and helping the user to adjust the tap (2) to the desired position is provided. In order to exemplify the operation of the system (A), when the user wants the burner (3) to burn in low state, s/he chooses this state via touch button (1.4) and this state is displayed in digital indicator (1.3). Afterwards, the information coming from software is processed by microprocessor (1.1) and then is transferred to servomotor (2.14). Again, the electromagnet (2.6) is turned on by being provided with current and the electromagnet (2.6) allows gas passage. Another information processed by microprocessor (1.1) is that the igniter (3.1) performs ignition at certain intervals (e.g. every five minutes) in accordance with software. Servomotor (2.14) drives the system in accordance with the information received and the male (2.4) is rotated at a certain angle, and thus the gas (Q) at a certain flow rate is directed to outlet. The gas directed to gas outlet (2.3) is transferred to the burner (3) where burning will take place, by means of interconnecting pipes. That is, a gas flow (1.7) from the tap (2) towards the burner (3) takes place. After burning occurs, flame holder (3.3) detects the heat, thereby providing burning consistency. This information coming from flame holder (3.3) is amplified by a signal amplifier (1.2) such that software can detect and the information is detected. Thus, burning at desired power (kW) level by the user is performed in the burner (3). Again, while burning is going on at a certain power level, the user interferes in the process by using touch button (1.4) and s/he can increase or decrease the flow rate of the gas directed to burner (3). Moreover, s/he can stop burning by using touch button (1.4). Referring to connection type of the system (A) in Fig. 4, a power cable (1.6), an igniter connecting cable (3.2), a flame holder connecting cable (3.4), a flame holder grounding cable (3.5), a touch button connecting cable (1.5), and a servomotor connecting cable (2.14.2) are included in control panel (1). Again, electromagnet connecting cable (2.7) is directly connected with control panel (1). That is, the information is sent to electromagnet (2.6) directly from control panel (1). Upon burning out in the burner (3), control panel (1) stops providing current to electromagnet (2.6) and electromagnet (2.6), in turn, automatically stops gas supply.
In Fig. 5, a new gas tap with electromagnet (2) operating synchronically with the newly developed touch-sensitive gas control system (A) is seen. The gas tap (2) according to the invention comprises, in most general terms, a body (2.1), a gas inlet (2.2), a gas outlet (2.3), a pin (2.5), a male (2.4), a spring (2.8), a segment (2.8.1) preventing said spring (2.8) from being displaced, an adjustment screw (2.10), a gasket (2.11), a union (2.9), and an electromagnet (2.6). Moreover, a gearbox (2.12) and a gear system cover (2.13) mounted on it are provided in the newly developed tap (2). Provided in said gearbox (2.12) are as follows; a servomotor (2.14), a gear (2.15) driven by said servomotor (2.14), and a pinion (2.16). Exploded view of the components constituting gas tap (2) is given in Fig. 6 for a better understanding thereof. In the bottom of this figure, a tap (2) is seen together with the reference numerals of the following components; a male (2.4), a pin (2.5), a spring (2.8) and an adjustment screw (2.10). As seen in this figure, the tap (2) is provided with shaft and cover, as in conventional taps. The gearbox (2.12) is mounted on the body (2.1) of said tap (2) by means of two connecting screws (2.12.14). Servomotor (2.14), gear (2.15) and pinion (2.16) are located in said gearbox (2.12). Servomotor (2.14) is fixed inside the gearbox (2.12) by means of at least one fixing screw (2.14.3). Gear (2.15) and pinion (2.16) are located in housings (to be further explained) (1.12.8, 2.12.10) within gearbox (2.12) and the gear (2.15) is connected to outlet gear (2.14.1) of servomotor (2.14) via a gear connecting screw (2.15.4). Finally, the gear system cover (2.13) is mounted on said gearbox (2.12) such that it will be entirely closed, by means of at least four connecting screws (2.13.5). The reason for using this gear system cover (2.13) within the system is to prevent the system from being damaged and to prolong its service life, by preventing food or other external residues from getting in gearbox (2.12). In Fig. 7, the overall perspective view of the gas tap (2) according to the invention, in which electromagnet part (2.6) is omitted, is given. Here, the function of electromagnet (2.6) is to allow gas passage in accordance with the current provided by control panel (1), or to stop gas supply. In other words, it is to provide safety in the tap (2). The function of the pin (2.5) seen in Fig. 8, on the other hand, is to prevent gas leakage from the gasket (2.11) and male (2.4) positioned thereon. Again, said pin (2.5) is provided with a spring (2.8) embedded thereon, and with a segment (2.8.1) that prevents this spring (2.8) from being displaced. Upon mounting gear system cover (2.13) onto the gearbox (2.12), the pin (2.5) is pushed forward. Here, the pin (2.5) is positioned in circular vertical extension (2.13.3.5) provided in the lower part of said cover (2.13). What is aimed by designing this circular vertical extension (2.13.3.5) is to allow both the centering of the pin (2.5), and embedding the pinion (2.16). The male (2.4) as seen in Fig. 9 enables the gas at desired flow rate (Q) to be directed to outlet (2.3) in accordance with the burning state chosen via touch button (1.4). Gas passage at desired flow rate (Q) is performed by means of holes and channels (2.4.2) on the male (2.4). When the burner (3) burns out, flame holder (3.3) detects it and the control panel (1) stops electromagnet (2.6) current, thereby automatically stopping gas flow with the electromagnet (2.9) cutting off current. Another perspective view of the tap (2) according to the invention is given in Fig. 10, while the perspective view showing the inner part of the tap (2) according to the invention, without gear system cover (2.13) thereon, is given in Fig. 11; and in Fig. 12, overall perspective views of the gearbox (2.12) are given in Fig. 12. As seen in Fig. 12, a rectangular servomotor housing (2.12.7) is provided in said gearbox (2.12). Servomotor (2.14) driving the system is located in said servomotor housing (2.12.7). Two servomotor fixing ridges (2.12.13) are provided in said rectangular servomotor housing (2.12.7). In order for the servomotor (2.14) to be located in said servomotor housing (2.12.7) properly, the length (2.12.13.1) of said fixing ridges is the same size as the distance (2.14.6) between lower surface (2.14.4.1) of servomotor connecting ridge (2.14.4) and servomotor lower surface (2.14.5). Again, in order for servomotor (2.14) to be fixed, there are L-shaped ridges (2.12.13.2) on the edges of said servomotor fixing ridges (2.12.13). Moreover, one screw hole (2.12.4) is provided for each one of said servomotor fixing ridges (2.12.13). In this way, servomotor (2.14) is mounted on the gearbox (2.12) by means of at least one screw (2.14.3). As the outlet of servomotor connecting cable (2.14.2), a servomotor connecting cable duct (2.12.5) is designed in the lower part of the gearbox (2.12). At least four internal threaded screw holes (2.12.1), an adjustment screw hole (2.12.2), and two mounting holes (2.12.3) onto the body are provided on gearbox (2.12). In addition, two screw hole cavities (2.12.11) are designed within said gearbox (2.12) in order to facilitate reaching connection screws (2.12.14). A servomotor outlet gear (2.14.1) is provided in the upper part of servomotor (2.14). This servomotor outlet gear (2.14.1) is placed in stepped and internal threaded center hole (2.15.2.2) in lower surface of the gear and is mounted by means of a screw (2.15.4) located in stepped gear center hole (2.15.1.2) on the upper surface of the gear, thereby rotation movement being transferred to the gear (2.15). Therefore, the size of said servomotor outlet gear (2.14.1) is such that it will be properly located in said stepped and internal threaded center hole (2.15.2.2) on the lower surface of the gear and thread features thereof are consistent with one another. Thus, the gear (2.15) is placed in circular gear housing (2.12.8) on the gearbox (2.12). Therefore, the diameter (2.12.8.1) of said circular gear housing is equal to or greater than the outer diameter (2.15.5) of the gear. Again, two C-shaped cavities (2.12.9) are provided in circular gear housing (2.12.8) that is positioned symmetric to Y-axis. The ridge (2.15.2.1) on the lower surface (2.15.2) of the gear (2.15) is placed in said two C-shaped cavities (2.12.9), thereby serving as a bearing for the gear (2.15). The distance (2.12.9.1) between the centers of these two C-shaped cavities (2.12.9) is equal to or greater than the ridge diameter (2.15.2.1.1) in the lower surface of the gear. Referring to the gearbox (2.12) in Fig. 12, said circular gear housing (2.12.8) and a circular pinion housing (2.12.10) are seen, the latter being centered in the same X-axis as the former. Here, the diameter (2.12.10.1) of this circular pinion housing (2.12.10) is equal to or greater than outer diameter (2.16.8) of the pinion (2.16). Again, a hole (2.12.6) through which a male in the same center as said circular pinion housing (2.12.10) is provided. When gearbox (2.12) is mounted on the tap (2), the components called male (2.4) passes through this hole (2.12.6). Therefore, the diameter (2.12.6.2) of the hole (2.12.6) through which said male passes is equal to or greater than the diameter (2.4.3) of the upper part of the male. Furthermore, an inner level (2.12.6.1) of the hole through which a male passes with a greater diameter than the diameter (2.12.6.2) of the hole through which said male passes is provided. The diameter of the inner level (2.12.6.1.1) through which said male passes is required to be equal to or greater than the inner diameter (2.16.7) of the pinion (2.16). In this way, the male (2.4) is enabled to pass through pinion hole (2.16.1) and the pinion (2.16) is placed on said inner level (2.12.6.1) of the hole through which said male passes. Therefore, the diameter (2.16.1.1.1) of the pinion hole level is such that the outer diameter (2.4.3) of the upper part of the male will pass there through, preferably between 7 and 14 mm. Another aspect to be taken into consideration in order for the pinion (2.16) to be mounted on gearbox (2.12) is that pinion nail (2.16.2) provided on pinion (2.16) and placed in pinion hole (2.16.1) passes through male crack (2.4.1). Therefore, the width (2.16.2.1) of said pinion nail (2.16.2) can be between 1 and 4 mm, such that it will pass through male crack (2.4.1). Again, radially scattered threads (2.16.3) around pinion (2.16) center are provided. In order for the pinion (2.16) to be placed on gearbox (2.12), the distance b1 on the pinion (2.16) is the same size as the depth b2 on the gearbox (2.12). Here, b2 is the depth of the inner level of the hole (2.12.6) through which the male passes. On the other hand, b1 is the distance between pinion upper surface (2.16.5) and upper surface (2.16.6) of thread section. The function of the pinion nail (2.16.2) is to transfer rotation movement coming from the gear (2.15) to the male (2.4). Gas passage at a certain flow rate (Q) through the holes and channels (2.4.2) on the male (2.4) is permitted by the rotation movement transferred to the male (2.4).
In Figs. 22, 23, 24, and 25, different views of the designed gear (2.15) are given for a better understanding thereof. As seen in Fig. 21, radially scattered threads (2.15.3) are provided in gear (2.15) around center of gear (2.15), on the spring section (w) which a center angle α faces. Said gear center angle α can be between 500 and 200°, depending on operating angles of the tap (2). Again the thread length and thread cavities of all of these threads (2.15.3) are the same, except for at least one thread (2.15.3.1) having a different thread length. Thread length (2.15.3.1.1) of at least one thread (2.15.3.1) having a different thread length is bigger than thread size of the other threads (2.15.3), preferably between 3 and 6 mm. The case when said at least one thread (2.15.3.1) having a different thread length is placed in closed position thread cavity (2.16.4) on the pinion (2.16) is "0" reference position at which no gas passage occurs in the tap (2), i.e. closed position. When said at least one thread (2.15.3.1) having a different thread length leaves said closed position thread cavity (2.16.4), the gas passing through gas passage channels and holes (2.4.2) on the male (2.4) at a certain flow rate (Q) is directed to outlet (2.3). As seen in Figs. 30 and 31, gas passage is performed by means of gear pair consisting of pinion (2.16) and the gear (2.15) operating in coordination with one another. Here, the ratio of gear (2.15) outer diameter (2.15.5) to pinion (2.16) diameter (2.16.8) is between 1,4 and 2.
In Figures 17, 18, and 19, different views of the gear system cover (2.13) are given. As seen in top perspective view of the gear system cover (2.13) in Fig. 17, it is designed in such a form that it will completely cover the gearbox (2.12). Again, at least four screw holes (2.13.1) are provided on the upper surface (2.13.4) of said gear system cover (2.13). Each one of said screw holes (2.13.1) has screw hole inner levels (2.13.1.1) in order for screw heads to be placed thereto. At least one adjustment screw hole (2.13.2) is provided in order to reach the adjustment screw (2.10). All of these screw holes (2.13.1, 2.13.2) on the upper surface (2.13.4) are opened into the lower surface (2.13.3) of the cover as seen in Fig. 18. Referring to bottom perspective view of the gear system cover (2.13) in Fig. 18, there exist a circular gear housing (2.13.3.1), a circular pinion housing (2.13.3.3) and a circular vertical extension (2.13.3.5). Said circular gear housing (2.13.3.1) and circular pinion housing (2.13.3.3) have peripheral beveling (2.13.3.2, 2.13.3.4) (one for each). The ridge (2.15.1.1) on the upper surface (2.15.1) of the gear (2.15) is placed in said circular gear housing (2.13.3.3). Therefore, the diameter (2.13.3.1.1) of the circular gear housing (2.13.3.1) can be equal to or greater than the of upper surface ridge diameter (2.15.1.1.1) of the gear (2.15). Again, a pinion (2.16) is positioned in circular pinion housing (2.13.3.3) on the gear system cover (2.13). The diameter (2.13.3.3.1) of this circular pinion housing (2.13.3.3) can be equal to or greater than the outer diameter (2.16.8) of the pinion. Again, the circular vertical extension (2.13.3.5) on the lower surface (2.13.3) of the gear system cover (2.13) is designed for pushing the pin (2.5) forward. Therefore, the inner diameter (2.13.3.5.1) of said circular vertical extension (2.13.3.5) can be equal to or greater than pin diameter (2.5.1). It is required that the outer diameter (2.13.3.5.2) of said circular vertical extension (2.13.3.5) is smaller than the diameter (2.16.1.2) of the pinion (2.16) hole. Again, in order to facilitate mounting of gear system cover (2.13) on the gearbox (2.12), vertical extensions (2.13.3.6, 2.13.3.7) are provided. U-shaped vertical extension (2.13.3.6) facilitates positioning of the cover (2.13) in servomotor housing (2.12.7) section, as well as preventing wrong mounting. Therefore, the width (2.13.3.6.1) of said U-shaped vertical extension and the width (2.12.7.1) of servomotor housing of the gearbox (2.1) are of the same size. Again, at least two vertical extensions (2.13.3.7) positioned between screw holes (2.13.1) are designed such that they will be engaged in gear system cover mounting cavities (2.12.12) on the gearbox (2.12). At least two vertical extensions (2.13.2.7) provided between these screw holes are designed for mounting the gear system cover (2.13) on the gearbox (2.12) easily. In this way, gear system cover (2.13) is mounted on gearbox (2.12) by means of at least four connecting screws (2.13.5). Due to the fact that gear system cover (2.13) is mounted on gearbox (2.12) so as to completely cover it, food residues and other external residues are prevented from getting in gearbox (2.12), thereby avoiding damages to the system operation, as well as prolonging service life thereof.
The protection scope of this application is stated under the claims and cannot be restricted to the descriptions given only for illustrative purposes, because it is clear that any person skilled in the art can produce the novelty provided with the invention, without drifting apart from the main subject of the invention and/or s/he can apply this novelty to the other fields used in the related technique with similar purposes. Therefore, it is obvious that such embodiments will lack novelty, and especially will lack the criteria of exceeding the prior art, i.e. comprising inventive step.

Claims

The invention is a safety gas tap (2) which is used in domestic cooking appliances and which directs gas flow to the burners (3) by synchronically operating with touch-sensitive gas control system (A), and comprising, in most general terms; a body (2.1), a gas inlet (2.2), a gas outlet (2.3), a male (2.4), a pin (2.5), a gasket (2.11), a gearbox (2.12), a servomotor (2.14), a gear (2.15), a pinion (2.16) and a gear system cover (2.13); characterized in that it is provided with an electromagnet (2.6) directly connected to control panel (1) by means of an electromagnet connecting cable (2.7).
A gearbox (2.12) according to Claim 1; characterized in that two screw hole cavities (2.12.11) are provided therein order to facilitate reaching connection screws (2.12.14) provided on it.
A gearbox (2.12) according to Claim 1; characterized in that two C-shaped cavities (2.12.9) are provided in circular gear housing (2.12.8) that are positioned symmetric to Y-axis.
Two C-shaped cavities (2.12.9) according to Claim 3; characterized in that the distance (2.12.9.1) between the centers of said two C-shaped cavities is equal to or greater than the ridge (2.15.2.1) diameter (2.15.2.1.1) in the lower surface of the gear.
A gearbox (2.12) according to Claim 1; characterized in that one adjustment screw hole (2.12.2) is provided thereon in order for the user to reach to the adjustment screw (2.10) easily.
A gear (2.15) according to Claim 1; characterized in that at least one thread (2.15.3.1) having a thread length different from thread length of the threads (2.15.3) that are radially scattered around gear (2.15) center along the spring (w), which center angle α faces, is provided.
A pinion (2.16) according to Claim 1; characterized in that at least one closed position thread cavity (2.16.4) is provided therein such that at least one thread (2.15.3.1) having a different thread length and provided on the gear (2.5) will be placed therein in order to define the closed position.
A pinion (2.15) according to Claim 1; characterized in that the length b1 thereon is the same size as the depth b2 on the gearbox (2.12).
A gear system cover (2.13) according to Claim 1; characterized in that one adjustment screw hole (2.13.2) is provided thereon, in order to reach the adjustment screw (2.10) easily.
A gear system cover (2.13) according to Claim 1; characterized in that the inner diameter (2.13.3.5.1) of said circular vertical extension is equal to or greater than pin diameter (2.5.1), in order for the circular vertical extension (2.13.3.5) provided thereon to center the pin (2.5).